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Problem: OpenPGM may calculate incorrect checksums when sending RDATA packets
if no ODATA packet has been sent before. When and why this
happens exactly is unknown.
Solution: Always force recomputation of checksums until a more suitable
solution is found.
--- openpgm-r1135-pristine/pgm/source.c 2010-09-09 03:24:47.000000000 +0200
+++ openpgm-svn-r1135/pgm/source.c 2010-09-30 18:32:04.000000000 +0200
@@ -2295,7 +2295,7 @@
header->pgm_checksum = 0;
const size_t pgm_header_len = tpdu_length - ntohs(header->pgm_tsdu_length);
uint32_t unfolded_header = pgm_csum_partial (header, pgm_header_len, 0);
- uint32_t unfolded_odata = pgm_txw_get_unfolded_checksum (skb);
+ uint32_t unfolded_odata = pgm_csum_partial (skb->data, ntohs(header->pgm_tsdu_length), 0);
header->pgm_checksum = pgm_csum_fold (pgm_csum_block_add (unfolded_header, unfolded_odata, pgm_header_len));
/* congestion control */
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